Method of grinding



' May 26, 1925. 1,539,742

H. F. JOSEPH METHOD OF GRINDING Filed May l5, 192.5

Patented May 25, i925.

UNITED STATES HARRY 1?". JOSEPH, OF IDAVENPGRT,` IOXVJA,

ASSIGNOR T0 MICRO MACHINE COMPANY,

OF BETTENDORF, IOVA, A CGRFORATION OF IOWA. K

METHOD or enrimine.

Application led May 15,

To all whom t may concern;

Be it lrnown that I. HARRY I?. JOSEPH, va citizen of the United States, residing at Davenport, in the county of Scott and State of Iowa, have invented a certain'new and useful Improvement in Methods of Grinch ing, of which the following vis a full, clear, and exact description, reference being had to the accompanying drawings. f This invention relates to a method of wet grinding and more particularly to a method for the internal grinding of cylinders and the like.

An object of the invention is to provide a process for grinding in whicha liquid is used to forcibly wash the sediment and grindings from the sides of the cylinder and carry them out, so that a clean surface of the metal is always presented to thefgrinding wheel. and also to cool the surface to be `ground.

A further object of ythe invention is to provide means whereby .a continuous stream of liquid may be projected upon the surface being ground. whereby lthe vusual advantages of wetgrinding as practiced on grinding external surfaces may be obtained.

In the grinding of cylinders internally it is customary to'rotate afsuitable spindle carrying a grinding wheell at the proper speed so that the speed between the 'contacting portion of the wheel and the cylinder is suitable for thecharacter of the'work and wheel. asis well understood `'in the art. In addition. the wheel is smaller'in diameter than the work and the'spind'le is lmounted eccentrically in a drum to'giv'e it a vrmovement in an orbital path `around ithe lwork so that only a smalll portion of the wheel and work are'in act-ual contact at any one instant andthe contacting 'portion moves in a cylindrical path around the inside of the cylinder.- In addition to these movements,` the cyl-inder or the spindleis moved longi tudinally 'one with respect tothe other'so that for a given setting a uniform lamount of material may be removedythroughout the lengthjofthe cylinder. f

In carrying out myprocess 'it is desirable to project liquid against the cylindrical wall to be ground preferably in the circumferential path of vthe grinding wheel so that the surfaceof the metaljust ahead of the contacting portion of the wheeland cylindrical wall will always be clean. Sutlicient liquid 1923. Serial No. 639,141.

should also be used not only to clean progressively directly in front of the wheel but; to flush out of the cylinder all of the sediment or material formed in the Lgrinding operation so that there will be no tendency for the wheel to load-by filling in the spaces between the grains of abrasive and thus prevent agood cutting action which is -desirable to obtain a substantially true cylinl drical recess.

In the accompanying drawings are disclosed two embodiments of my invention for accomplishing these purposes.

In the drawings,

VI-"gure 1 is ya vertical longitudinal sectional view taken throughthe spindle and the-operatingl mechanism.

' Fig'. 2 is a fragmentary section lof spindle mounted within a cylinder.

F ig. 3 is asimilar view of a vmodified form in which the liquid is carried outside the spindle. v

Fig. t is a section on line 4-4,-'Fig.' 3f

i Fig. 5 vis al section online 5 5, Fig. 2, showing the baffle construction. i

The invention isl shown in connection with a machine forinte'rn-al grinding of the general type shown in my Patent No. 1,396,123.- 'Ihe machine frame'orsupport a. has a cylindrical'portion orin'which is rotatably mounted the drum c.' -The drumv c'has an external gear d in mesh with the gear c of the drive shaft f and is thereby constantly rotated.' flournaled in 'the drum c is an eccentric sleeve'member g having'a worrnwheell fixed to one end which meshes with aworm j carried'by the'druni. A ltubular spindle housing is rigidly secured within an eccen tric 'borein the ends'ofzthe sleeve g and extends parallel with the axis thereof; The sleeve member g maybe adjusted by the worm y' to vary Athe -eccentri'city of' the spindle housing 7c with respect to the drum. llVithin th'e spindle 'housing k is a tubular spindle Z' preferably composed of a plurality of sections independently mounted `for rotation therein.' through the pulley m by any suitable driving means,' not shown. l

Vith this lmechanism the spindle'housing is given anorbitall movement and the spindle is independently rotated within the housing,',as,is vco1nmonly understood in the art. It, is also :common to cause a relative longitudinal movementbetween the' grinding the :The spindle Z is drivenl wheel andther Ys-by mountin thewogk upon' aVV mofblgtbile' which lid reiprdted forward and backward with res ect-tothe gr-indng; Wheel .(n. example Q :Whehgs 5 shown uil'ny previously lnentioned potenti, or by mounting the grlndlng wheel splndle and its operating mechanism onfreciproclbing mechanism. My process may be carried vl0 shown), itbeing only necessary thatthere bei-al relativeflpirgftudmql movement between* t'hfe work-vane theffg-@riflrng-` `wheel.,l

itherthroiigh foi condhctilg liquid to t e la' grinding whee1 4.- Ther praeecuye: cnpr- 5 is'fsecure'l to' turn with th'efspirdlel unid rei ceis "on' itshub 5' thegriding Wlli ff The wheel' iris secuel 'claiped to yth'e Spi'ini to turn therewirithL A'bya'nut v6 which is' lcad within the recessed portion of thewh'eed 1. The nut 6lms'fr`dial passages or ducts 8 therethrough, the? innerlr erdsv1 of*a which" are' in communicationl 'withfthe spindlef" so tlit Y liquid VCorning through thespindfle is Ad ischarged into :the Vduets andv radially outwdlyI a 'inetf the wells o'f theF recess* iii* grin ing wheel. VVhenth spindle isfrdtqted at! a suitablel vgrinding speed; the fcentri'fllgal force imparted tothe 'liquiddiscl'mrged 30' the: ducts 8 causes" the liquid to'be c rrfed oifl" theidce` 9 of the wheel andy erduldt the cutting edge 10 of the wheel ririwhicl it isdischarged' radiallyl outwardly against the wrk' substantiallyy in" a4 plane through v In 1*`ig=;i1re 3 is shownii device for'l carrying the water? outside the* vvspindle to'A project* it a'gst thev cylindrical Wall in. or adj ident;

v thepltmne of the'grinding wheelso thatth 40"' liquid' `is forced; ycircuinferentiall' rouiid' j the cylinder wallfiand inthv plne" df thv grinding'wheel, thus keeping thef cylinder* wallcleali continuously infront of tliefc'o'nV tcting portions of the grinding wheel andcylinder; A'laring nozzle 18 is=carri6dby ozzle 1'8 hals an annuler series o"f perfor# ti's 20 'around' th peri lleiyto project liquidjagainst the work-,a jacelitthe pljf ofthewhelg' the supply pipe being indl' cated' et 21` i. t A. .,It will ths be thdt* ieithlr ffhd w" ignnbctthe wail, 1fmeinag in f all sed-imm 10u50 VmaterialiV v InL additiva; the presence of the liquid-during the' ingroggatibrl'produbesa relativelyh; polis surfaces which isf ofv 05' desirable for' cylinders in* intenll and prevent glazing or dulling of the abrasive particles in the wheel.

Attention is also directed to the fact that the presence of the liquid in the cylinder, as above described, does more than to simply keep the work cool during the grinding operation. It seems to act as a lubricant and produces a relatively smooth surface which is substantially true and which is highly desirable for cylinders for internal combustion engines and the like.

Furthermore, it is to be understood that the particular forms of apparatus shown and described, and the particular procedure set forth, are presented for purposes of eX- planation. and illustration and that various modifications of said apparatus and procedure can be made without departing from my invention as defined in the appended claims.

What I claim is:

l. The process of grinding cylinders, which comprises rotating the spindle carrying a grinding wheel, at relatively high speed in said cylinder, causing a relative orbital and longitudinal movement between the wheel and the cylinder, conducting liquid into the cylinder and outside the grinding wheel spindle and delivering it at a plurality of points against the face of the grinding wheel, thereby causing the liquid to be projected against the surface of the cylinder continuously in the saine direction as the rotation of the grinding wheel and at a relatively higher speed than said orbital movement, and 'causing said liquid to spread trnslversely across the orbital path of the w ee 2. The process of grinding c linders, which comprises rotating the spindle carrying a grinding wheel, at relatively high speed in said cylinder, causing a relative orbital and longitudinal movement between the wheel and the cylinder, conducting liquid through a duct outside the spindle and forcibly projecting the liquid against the internal surface of the cylinder ata velocity relatively higher than the said orbital movement of the spindle and in a plane substantially parallel to the plane of the grinding wheel, and thereby causing said liquid to continuously spread transversely across the path of the contacting portion of the grinding wheel and the wall of the recess.

8. The process of grinding cylinders which comprises rotating a spindle carryin a grinding wheel at a relatively high spee in said cylinder, causing a relative orbital and longitudinal movement between the wheel and cylinder, conducting liquid through a duct outside the spindle and forcibly projecting the liquid against the internal surface of the cylinder at a velocity relatively higher than said orbital movement of the spindle in such manner as to cause the liquid to rotate around said cylinder in the same direction as the orbital movement of the spindle and continuously spread tranversely across the path of the contacting portion of the grinding wheel and the wall of the recess. j

In testimony whereof, I hereunto alix my signature.

HARRY F. Josnrn. 

